Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1987STEP VAN P20, 6.2 J, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISCCC TBI TESTS W/CODESDIAGNOSTIC CHARTSCODE 14 - CTS (HIGH TEMP INDICATED - "SCAN" DIAGNOSTICS)TEST DESCRIPTION
1987 Chevrolet Step Van P20, 6.2 J, Standard
Test Description
1987 Chevrolet Step Van P20, 6.2 J, StandardSECTION Test Description
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- Code 14 will set if signal voltage indicates coolant temperature above 266°F (130°C) for more than three seconds.
- Tests if circuit No. 410 is shorted to ground. This will cause conditions for Code 14.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.